Junction-piece for branches of air-conduits and the like.



'NQl 862,649. PATBNTED AUG. 6, 1907.

G. H. MDWBR.

JUNCTION PIECE FOR BRNGHES OI' AIR GONDUITS AND THE LIKE.

- APPL'IUATION FILED H1B. 16, 190e.

zyezza 7L Mo ave 11 CHARLES HUDSON MOWER, OF LONDON, ENGLAND.

JUNCTION-PIECE FOR BILANCI-IES OF AIR-CONDUITS .AND THE LIKE.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed February 16, 1906. Serial No. 301,520.

To all 'whom it may concern:

Be it known that I, CHARLES HUDSON MowER, a citizen oi the United Statesof America, residing at London, England, have invented a certain new anduseiul Improved Junction-Piece for Branches of Air- Conduits and theLike, of which the following is a specilication.

This invention relates to an improved sheet metal junction for branchesof air conduits and the like.

The said improved junction or branch piece is made from sheet metal in avery simple and economical manner, and provides a very suitable junctionfor uniting two or more converging branch pipes to a single pipe orconduit.

The construction is especially adapted for conduits conveying air orgases either alone or laden with dust or other material, and it avoidsthe formation oi eddies or violent disturbances of the stream lines, andreduces rictional losses to a minimum.

In the accompanying drawing I have shown how my said invention may beconveniently and advantageously carried into practice. j

Figure l is a longitudinal central section oi my improved junction orbranch piece in which two branches join to form one conduit. Fig. 2 is alongitudinal section on the line fr, x, Fig. l. Fig. 3 is an end viewthereoi. Fig. 4 is a longitudinal central section of my improvedjunction piece in which three branches join to form one conduit, andFig. 5 is an end view of the same.

In carrying out my invention, according to one method, a sheet 0fsuitable material is bentV or folded to form a substantially conicalpipe by uniting the edges a ong a longitudinal seam. The larger end oithis con- 3 5 ical pipe is then distorted by drawing together the partsb, b thereof, and so forming two branches c, d united by a short webformed by the parts b, b which are here shown secured together by rivetse. Soldering or brazing may however be employed to unite these parts. Ajunction piece is thus formed from a sheet of suitable material, saidjunction piece having two branches c, fl converging to a single conduitf so shaped as not to cause any abrupt change oi direction oi fluid ormaterial flowing therein. Also by this construction two branches areformed as one structure without the necessity of attaching the branchesby cutting holes in one or both of them and forming flanges to permit oijoining the branches by riveting, soldering or the like.

Moreover, the present improved construction facilitates the attachmentof branches at very small angles,

to prevent frictional losses at the meeting of the converging streams ofair or gases.

My invention may be applied to cases wherein three or more branchesconverge into a single conduit, as illustrated in Figs. 4 and 5, whichshow sheet material bent or folded to orm three branches c, d, g,converging to a single conduit f. The dimensions of the junction piecemay be such that the cross-sectional area of the single Conduit at oneend may be equal to the combined cross-sectional areas of the branchesat the other end.

It is obvious that in the manufacture of these junctions the conicalpipe need not be completely formed and then distorted as above describedas other methods may be adopted, for example, the separate branches maybe formed successively from a sheet oi metal. Thus, in the example shownin Fig. l, the single sheet oi material may be bent or folded on asuitable mandrel to completely form the branch d and to partly vform thebranch c. After securing together the parts b, b the said mandrel can.be withdrawn and a second mandrel brought into use for the shaping oithe branch c. Then by forming the longitudinal seam, the completejunction piece is produced. Other modes oi manufacture may also beadopted, my invention consisting in providing a junction piece made fromsheet metal in which there are two or more branches at one end merginginto a single branch at the other, without involving the cutting of ahole in the metal as is usually done for the connection of the branches.

In place of the substantially cylindrical branches herein described, myimproved junction piece may be formed in a suitable manner to permittheir employment with conduits of rectangular or other cross-section.

When making very large pipes two or more sheets might have to be unitedby seaming or riveting, but the method oi constructing the brancheswould be the same as above described.

l. A junction piece for branches oi= air conduits and the like, formedfrom sheet metal by folding the saine to produce a multiple number ofbranches at one end converging into a single branch at the other end,and without cutting holes in the metal for the branch connections.

2. A junction piece for branches of al1' conduits and the like, saidjunction piece being formed of sheet material and consisting of aconical tube which has continuous portions of its wall drawn together atopposite places so as to form convergent branch apertures on each sideof said drawn together parts, and means for fastening such drawntogether parts of the wall to each other. v

In testimony whereof I have hereunto set my hand in presence of twosubscribing' witnesses.

CHARLES HUDSON MOWER.

Witnesses:

W. J. BAssETT, HERBERT A. Bans'roN.

